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1 | /* $Id: pgtable.h,v 1.110 2001/12/21 04:56:17 davem Exp $ */ | |
2 | #ifndef _SPARC_PGTABLE_H | |
3 | #define _SPARC_PGTABLE_H | |
4 | ||
5 | /* asm-sparc/pgtable.h: Defines and functions used to work | |
6 | * with Sparc page tables. | |
7 | * | |
8 | * Copyright (C) 1995 David S. Miller (davem@caip.rutgers.edu) | |
9 | * Copyright (C) 1998 Jakub Jelinek (jj@sunsite.mff.cuni.cz) | |
10 | */ | |
11 | ||
12 | #include <asm-generic/4level-fixup.h> | |
13 | ||
14 | #include <linux/config.h> | |
15 | #include <linux/spinlock.h> | |
16 | #include <linux/swap.h> | |
17 | #include <asm/types.h> | |
18 | #ifdef CONFIG_SUN4 | |
19 | #include <asm/pgtsun4.h> | |
20 | #else | |
21 | #include <asm/pgtsun4c.h> | |
22 | #endif | |
23 | #include <asm/pgtsrmmu.h> | |
24 | #include <asm/vac-ops.h> | |
25 | #include <asm/oplib.h> | |
26 | #include <asm/btfixup.h> | |
27 | #include <asm/system.h> | |
28 | ||
29 | #ifndef __ASSEMBLY__ | |
30 | ||
31 | struct vm_area_struct; | |
32 | struct page; | |
33 | ||
34 | extern void load_mmu(void); | |
35 | extern unsigned long calc_highpages(void); | |
36 | ||
37 | BTFIXUPDEF_SIMM13(pgdir_shift) | |
38 | BTFIXUPDEF_SETHI(pgdir_size) | |
39 | BTFIXUPDEF_SETHI(pgdir_mask) | |
40 | ||
41 | BTFIXUPDEF_SIMM13(ptrs_per_pmd) | |
42 | BTFIXUPDEF_SIMM13(ptrs_per_pgd) | |
43 | BTFIXUPDEF_SIMM13(user_ptrs_per_pgd) | |
44 | ||
45 | #define pte_ERROR(e) __builtin_trap() | |
46 | #define pmd_ERROR(e) __builtin_trap() | |
47 | #define pgd_ERROR(e) __builtin_trap() | |
48 | ||
49 | BTFIXUPDEF_INT(page_none) | |
50 | BTFIXUPDEF_INT(page_shared) | |
51 | BTFIXUPDEF_INT(page_copy) | |
52 | BTFIXUPDEF_INT(page_readonly) | |
53 | BTFIXUPDEF_INT(page_kernel) | |
54 | ||
55 | #define PMD_SHIFT SUN4C_PMD_SHIFT | |
56 | #define PMD_SIZE (1UL << PMD_SHIFT) | |
57 | #define PMD_MASK (~(PMD_SIZE-1)) | |
58 | #define PMD_ALIGN(__addr) (((__addr) + ~PMD_MASK) & PMD_MASK) | |
59 | #define PGDIR_SHIFT BTFIXUP_SIMM13(pgdir_shift) | |
60 | #define PGDIR_SIZE BTFIXUP_SETHI(pgdir_size) | |
61 | #define PGDIR_MASK BTFIXUP_SETHI(pgdir_mask) | |
62 | #define PTRS_PER_PTE 1024 | |
63 | #define PTRS_PER_PMD BTFIXUP_SIMM13(ptrs_per_pmd) | |
64 | #define PTRS_PER_PGD BTFIXUP_SIMM13(ptrs_per_pgd) | |
65 | #define USER_PTRS_PER_PGD BTFIXUP_SIMM13(user_ptrs_per_pgd) | |
66 | #define FIRST_USER_PGD_NR 0 | |
67 | #define PTE_SIZE (PTRS_PER_PTE*4) | |
68 | ||
69 | #define PAGE_NONE __pgprot(BTFIXUP_INT(page_none)) | |
70 | #define PAGE_SHARED __pgprot(BTFIXUP_INT(page_shared)) | |
71 | #define PAGE_COPY __pgprot(BTFIXUP_INT(page_copy)) | |
72 | #define PAGE_READONLY __pgprot(BTFIXUP_INT(page_readonly)) | |
73 | ||
74 | extern unsigned long page_kernel; | |
75 | ||
76 | #ifdef MODULE | |
77 | #define PAGE_KERNEL page_kernel | |
78 | #else | |
79 | #define PAGE_KERNEL __pgprot(BTFIXUP_INT(page_kernel)) | |
80 | #endif | |
81 | ||
82 | /* Top-level page directory */ | |
83 | extern pgd_t swapper_pg_dir[1024]; | |
84 | ||
85 | /* Page table for 0-4MB for everybody, on the Sparc this | |
86 | * holds the same as on the i386. | |
87 | */ | |
88 | extern pte_t pg0[1024]; | |
89 | extern pte_t pg1[1024]; | |
90 | extern pte_t pg2[1024]; | |
91 | extern pte_t pg3[1024]; | |
92 | ||
93 | extern unsigned long ptr_in_current_pgd; | |
94 | ||
95 | /* Here is a trick, since mmap.c need the initializer elements for | |
96 | * protection_map[] to be constant at compile time, I set the following | |
97 | * to all zeros. I set it to the real values after I link in the | |
98 | * appropriate MMU page table routines at boot time. | |
99 | */ | |
100 | #define __P000 __pgprot(0) | |
101 | #define __P001 __pgprot(0) | |
102 | #define __P010 __pgprot(0) | |
103 | #define __P011 __pgprot(0) | |
104 | #define __P100 __pgprot(0) | |
105 | #define __P101 __pgprot(0) | |
106 | #define __P110 __pgprot(0) | |
107 | #define __P111 __pgprot(0) | |
108 | ||
109 | #define __S000 __pgprot(0) | |
110 | #define __S001 __pgprot(0) | |
111 | #define __S010 __pgprot(0) | |
112 | #define __S011 __pgprot(0) | |
113 | #define __S100 __pgprot(0) | |
114 | #define __S101 __pgprot(0) | |
115 | #define __S110 __pgprot(0) | |
116 | #define __S111 __pgprot(0) | |
117 | ||
118 | extern int num_contexts; | |
119 | ||
120 | /* First physical page can be anywhere, the following is needed so that | |
121 | * va-->pa and vice versa conversions work properly without performance | |
122 | * hit for all __pa()/__va() operations. | |
123 | */ | |
124 | extern unsigned long phys_base; | |
125 | extern unsigned long pfn_base; | |
126 | ||
127 | /* | |
128 | * BAD_PAGETABLE is used when we need a bogus page-table, while | |
129 | * BAD_PAGE is used for a bogus page. | |
130 | * | |
131 | * ZERO_PAGE is a global shared page that is always zero: used | |
132 | * for zero-mapped memory areas etc.. | |
133 | */ | |
134 | extern pte_t * __bad_pagetable(void); | |
135 | extern pte_t __bad_page(void); | |
136 | extern unsigned long empty_zero_page; | |
137 | ||
138 | #define BAD_PAGETABLE __bad_pagetable() | |
139 | #define BAD_PAGE __bad_page() | |
140 | #define ZERO_PAGE(vaddr) (virt_to_page(&empty_zero_page)) | |
141 | ||
142 | /* | |
143 | */ | |
144 | BTFIXUPDEF_CALL_CONST(struct page *, pmd_page, pmd_t) | |
145 | BTFIXUPDEF_CALL_CONST(unsigned long, pgd_page, pgd_t) | |
146 | ||
147 | #define pmd_page(pmd) BTFIXUP_CALL(pmd_page)(pmd) | |
148 | #define pgd_page(pgd) BTFIXUP_CALL(pgd_page)(pgd) | |
149 | ||
150 | BTFIXUPDEF_SETHI(none_mask) | |
151 | BTFIXUPDEF_CALL_CONST(int, pte_present, pte_t) | |
152 | BTFIXUPDEF_CALL(void, pte_clear, pte_t *) | |
153 | BTFIXUPDEF_CALL(int, pte_read, pte_t) | |
154 | ||
155 | extern __inline__ int pte_none(pte_t pte) | |
156 | { | |
157 | return !(pte_val(pte) & ~BTFIXUP_SETHI(none_mask)); | |
158 | } | |
159 | ||
160 | #define pte_present(pte) BTFIXUP_CALL(pte_present)(pte) | |
161 | #define pte_clear(mm,addr,pte) BTFIXUP_CALL(pte_clear)(pte) | |
162 | #define pte_read(pte) BTFIXUP_CALL(pte_read)(pte) | |
163 | ||
164 | BTFIXUPDEF_CALL_CONST(int, pmd_bad, pmd_t) | |
165 | BTFIXUPDEF_CALL_CONST(int, pmd_present, pmd_t) | |
166 | BTFIXUPDEF_CALL(void, pmd_clear, pmd_t *) | |
167 | ||
168 | extern __inline__ int pmd_none(pmd_t pmd) | |
169 | { | |
170 | return !(pmd_val(pmd) & ~BTFIXUP_SETHI(none_mask)); | |
171 | } | |
172 | ||
173 | #define pmd_bad(pmd) BTFIXUP_CALL(pmd_bad)(pmd) | |
174 | #define pmd_present(pmd) BTFIXUP_CALL(pmd_present)(pmd) | |
175 | #define pmd_clear(pmd) BTFIXUP_CALL(pmd_clear)(pmd) | |
176 | ||
177 | BTFIXUPDEF_CALL_CONST(int, pgd_none, pgd_t) | |
178 | BTFIXUPDEF_CALL_CONST(int, pgd_bad, pgd_t) | |
179 | BTFIXUPDEF_CALL_CONST(int, pgd_present, pgd_t) | |
180 | BTFIXUPDEF_CALL(void, pgd_clear, pgd_t *) | |
181 | ||
182 | #define pgd_none(pgd) BTFIXUP_CALL(pgd_none)(pgd) | |
183 | #define pgd_bad(pgd) BTFIXUP_CALL(pgd_bad)(pgd) | |
184 | #define pgd_present(pgd) BTFIXUP_CALL(pgd_present)(pgd) | |
185 | #define pgd_clear(pgd) BTFIXUP_CALL(pgd_clear)(pgd) | |
186 | ||
187 | /* | |
188 | * The following only work if pte_present() is true. | |
189 | * Undefined behaviour if not.. | |
190 | */ | |
191 | BTFIXUPDEF_HALF(pte_writei) | |
192 | BTFIXUPDEF_HALF(pte_dirtyi) | |
193 | BTFIXUPDEF_HALF(pte_youngi) | |
194 | ||
195 | extern int pte_write(pte_t pte) __attribute_const__; | |
196 | extern __inline__ int pte_write(pte_t pte) | |
197 | { | |
198 | return pte_val(pte) & BTFIXUP_HALF(pte_writei); | |
199 | } | |
200 | ||
201 | extern int pte_dirty(pte_t pte) __attribute_const__; | |
202 | extern __inline__ int pte_dirty(pte_t pte) | |
203 | { | |
204 | return pte_val(pte) & BTFIXUP_HALF(pte_dirtyi); | |
205 | } | |
206 | ||
207 | extern int pte_young(pte_t pte) __attribute_const__; | |
208 | extern __inline__ int pte_young(pte_t pte) | |
209 | { | |
210 | return pte_val(pte) & BTFIXUP_HALF(pte_youngi); | |
211 | } | |
212 | ||
213 | /* | |
214 | * The following only work if pte_present() is not true. | |
215 | */ | |
216 | BTFIXUPDEF_HALF(pte_filei) | |
217 | ||
218 | extern int pte_file(pte_t pte) __attribute_const__; | |
219 | extern __inline__ int pte_file(pte_t pte) | |
220 | { | |
221 | return pte_val(pte) & BTFIXUP_HALF(pte_filei); | |
222 | } | |
223 | ||
224 | /* | |
225 | */ | |
226 | BTFIXUPDEF_HALF(pte_wrprotecti) | |
227 | BTFIXUPDEF_HALF(pte_mkcleani) | |
228 | BTFIXUPDEF_HALF(pte_mkoldi) | |
229 | ||
230 | extern pte_t pte_wrprotect(pte_t pte) __attribute_const__; | |
231 | extern __inline__ pte_t pte_wrprotect(pte_t pte) | |
232 | { | |
233 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_wrprotecti)); | |
234 | } | |
235 | ||
236 | extern pte_t pte_mkclean(pte_t pte) __attribute_const__; | |
237 | extern __inline__ pte_t pte_mkclean(pte_t pte) | |
238 | { | |
239 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkcleani)); | |
240 | } | |
241 | ||
242 | extern pte_t pte_mkold(pte_t pte) __attribute_const__; | |
243 | extern __inline__ pte_t pte_mkold(pte_t pte) | |
244 | { | |
245 | return __pte(pte_val(pte) & ~BTFIXUP_HALF(pte_mkoldi)); | |
246 | } | |
247 | ||
248 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkwrite, pte_t) | |
249 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkdirty, pte_t) | |
250 | BTFIXUPDEF_CALL_CONST(pte_t, pte_mkyoung, pte_t) | |
251 | ||
252 | #define pte_mkwrite(pte) BTFIXUP_CALL(pte_mkwrite)(pte) | |
253 | #define pte_mkdirty(pte) BTFIXUP_CALL(pte_mkdirty)(pte) | |
254 | #define pte_mkyoung(pte) BTFIXUP_CALL(pte_mkyoung)(pte) | |
255 | ||
256 | #define page_pte_prot(page, prot) mk_pte(page, prot) | |
257 | #define page_pte(page) mk_pte(page, __pgprot(0)) | |
258 | #define pfn_pte(pfn, prot) mk_pte(pfn_to_page(pfn), prot) | |
259 | ||
260 | BTFIXUPDEF_CALL(unsigned long, pte_pfn, pte_t) | |
261 | #define pte_pfn(pte) BTFIXUP_CALL(pte_pfn)(pte) | |
262 | #define pte_page(pte) pfn_to_page(pte_pfn(pte)) | |
263 | ||
264 | /* | |
265 | * Conversion functions: convert a page and protection to a page entry, | |
266 | * and a page entry and page directory to the page they refer to. | |
267 | */ | |
268 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte, struct page *, pgprot_t) | |
269 | ||
270 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_phys, unsigned long, pgprot_t) | |
271 | BTFIXUPDEF_CALL_CONST(pte_t, mk_pte_io, unsigned long, pgprot_t, int) | |
272 | ||
273 | #define mk_pte(page,pgprot) BTFIXUP_CALL(mk_pte)(page,pgprot) | |
274 | #define mk_pte_phys(page,pgprot) BTFIXUP_CALL(mk_pte_phys)(page,pgprot) | |
275 | #define mk_pte_io(page,pgprot,space) BTFIXUP_CALL(mk_pte_io)(page,pgprot,space) | |
276 | ||
277 | BTFIXUPDEF_INT(pte_modify_mask) | |
278 | ||
279 | extern pte_t pte_modify(pte_t pte, pgprot_t newprot) __attribute_const__; | |
280 | extern __inline__ pte_t pte_modify(pte_t pte, pgprot_t newprot) | |
281 | { | |
282 | return __pte((pte_val(pte) & BTFIXUP_INT(pte_modify_mask)) | | |
283 | pgprot_val(newprot)); | |
284 | } | |
285 | ||
286 | #define pgd_index(address) ((address) >> PGDIR_SHIFT) | |
287 | ||
288 | /* to find an entry in a page-table-directory */ | |
289 | #define pgd_offset(mm, address) ((mm)->pgd + pgd_index(address)) | |
290 | ||
291 | /* to find an entry in a kernel page-table-directory */ | |
292 | #define pgd_offset_k(address) pgd_offset(&init_mm, address) | |
293 | ||
294 | /* Find an entry in the second-level page table.. */ | |
295 | BTFIXUPDEF_CALL(pmd_t *, pmd_offset, pgd_t *, unsigned long) | |
296 | #define pmd_offset(dir,addr) BTFIXUP_CALL(pmd_offset)(dir,addr) | |
297 | ||
298 | /* Find an entry in the third-level page table.. */ | |
299 | BTFIXUPDEF_CALL(pte_t *, pte_offset_kernel, pmd_t *, unsigned long) | |
300 | #define pte_offset_kernel(dir,addr) BTFIXUP_CALL(pte_offset_kernel)(dir,addr) | |
301 | ||
302 | /* | |
303 | * This shortcut works on sun4m (and sun4d) because the nocache area is static, | |
304 | * and sun4c is guaranteed to have no highmem anyway. | |
305 | */ | |
306 | #define pte_offset_map(d, a) pte_offset_kernel(d,a) | |
307 | #define pte_offset_map_nested(d, a) pte_offset_kernel(d,a) | |
308 | ||
309 | #define pte_unmap(pte) do{}while(0) | |
310 | #define pte_unmap_nested(pte) do{}while(0) | |
311 | ||
312 | /* The permissions for pgprot_val to make a page mapped on the obio space */ | |
313 | extern unsigned int pg_iobits; | |
314 | ||
315 | /* Certain architectures need to do special things when pte's | |
316 | * within a page table are directly modified. Thus, the following | |
317 | * hook is made available. | |
318 | */ | |
319 | ||
320 | BTFIXUPDEF_CALL(void, set_pte, pte_t *, pte_t) | |
321 | ||
322 | #define set_pte(ptep,pteval) BTFIXUP_CALL(set_pte)(ptep,pteval) | |
323 | #define set_pte_at(mm,addr,ptep,pteval) set_pte(ptep,pteval) | |
324 | ||
325 | struct seq_file; | |
326 | BTFIXUPDEF_CALL(void, mmu_info, struct seq_file *) | |
327 | ||
328 | #define mmu_info(p) BTFIXUP_CALL(mmu_info)(p) | |
329 | ||
330 | /* Fault handler stuff... */ | |
331 | #define FAULT_CODE_PROT 0x1 | |
332 | #define FAULT_CODE_WRITE 0x2 | |
333 | #define FAULT_CODE_USER 0x4 | |
334 | ||
335 | BTFIXUPDEF_CALL(void, update_mmu_cache, struct vm_area_struct *, unsigned long, pte_t) | |
336 | ||
337 | #define update_mmu_cache(vma,addr,pte) BTFIXUP_CALL(update_mmu_cache)(vma,addr,pte) | |
338 | ||
339 | BTFIXUPDEF_CALL(void, sparc_mapiorange, unsigned int, unsigned long, | |
340 | unsigned long, unsigned int) | |
341 | BTFIXUPDEF_CALL(void, sparc_unmapiorange, unsigned long, unsigned int) | |
342 | #define sparc_mapiorange(bus,pa,va,len) BTFIXUP_CALL(sparc_mapiorange)(bus,pa,va,len) | |
343 | #define sparc_unmapiorange(va,len) BTFIXUP_CALL(sparc_unmapiorange)(va,len) | |
344 | ||
345 | extern int invalid_segment; | |
346 | ||
347 | /* Encode and de-code a swap entry */ | |
348 | BTFIXUPDEF_CALL(unsigned long, __swp_type, swp_entry_t) | |
349 | BTFIXUPDEF_CALL(unsigned long, __swp_offset, swp_entry_t) | |
350 | BTFIXUPDEF_CALL(swp_entry_t, __swp_entry, unsigned long, unsigned long) | |
351 | ||
352 | #define __swp_type(__x) BTFIXUP_CALL(__swp_type)(__x) | |
353 | #define __swp_offset(__x) BTFIXUP_CALL(__swp_offset)(__x) | |
354 | #define __swp_entry(__type,__off) BTFIXUP_CALL(__swp_entry)(__type,__off) | |
355 | ||
356 | #define __pte_to_swp_entry(pte) ((swp_entry_t) { pte_val(pte) }) | |
357 | #define __swp_entry_to_pte(x) ((pte_t) { (x).val }) | |
358 | ||
359 | /* file-offset-in-pte helpers */ | |
360 | BTFIXUPDEF_CALL(unsigned long, pte_to_pgoff, pte_t pte); | |
361 | BTFIXUPDEF_CALL(pte_t, pgoff_to_pte, unsigned long pgoff); | |
362 | ||
363 | #define pte_to_pgoff(pte) BTFIXUP_CALL(pte_to_pgoff)(pte) | |
364 | #define pgoff_to_pte(off) BTFIXUP_CALL(pgoff_to_pte)(off) | |
365 | ||
366 | /* | |
367 | * This is made a constant because mm/fremap.c required a constant. | |
368 | * Note that layout of these bits is different between sun4c.c and srmmu.c. | |
369 | */ | |
370 | #define PTE_FILE_MAX_BITS 24 | |
371 | ||
372 | /* | |
373 | */ | |
374 | struct ctx_list { | |
375 | struct ctx_list *next; | |
376 | struct ctx_list *prev; | |
377 | unsigned int ctx_number; | |
378 | struct mm_struct *ctx_mm; | |
379 | }; | |
380 | ||
381 | extern struct ctx_list *ctx_list_pool; /* Dynamically allocated */ | |
382 | extern struct ctx_list ctx_free; /* Head of free list */ | |
383 | extern struct ctx_list ctx_used; /* Head of used contexts list */ | |
384 | ||
385 | #define NO_CONTEXT -1 | |
386 | ||
387 | extern __inline__ void remove_from_ctx_list(struct ctx_list *entry) | |
388 | { | |
389 | entry->next->prev = entry->prev; | |
390 | entry->prev->next = entry->next; | |
391 | } | |
392 | ||
393 | extern __inline__ void add_to_ctx_list(struct ctx_list *head, struct ctx_list *entry) | |
394 | { | |
395 | entry->next = head; | |
396 | (entry->prev = head->prev)->next = entry; | |
397 | head->prev = entry; | |
398 | } | |
399 | #define add_to_free_ctxlist(entry) add_to_ctx_list(&ctx_free, entry) | |
400 | #define add_to_used_ctxlist(entry) add_to_ctx_list(&ctx_used, entry) | |
401 | ||
402 | extern __inline__ unsigned long | |
403 | __get_phys (unsigned long addr) | |
404 | { | |
405 | switch (sparc_cpu_model){ | |
406 | case sun4: | |
407 | case sun4c: | |
408 | return sun4c_get_pte (addr) << PAGE_SHIFT; | |
409 | case sun4m: | |
410 | case sun4d: | |
411 | return ((srmmu_get_pte (addr) & 0xffffff00) << 4); | |
412 | default: | |
413 | return 0; | |
414 | } | |
415 | } | |
416 | ||
417 | extern __inline__ int | |
418 | __get_iospace (unsigned long addr) | |
419 | { | |
420 | switch (sparc_cpu_model){ | |
421 | case sun4: | |
422 | case sun4c: | |
423 | return -1; /* Don't check iospace on sun4c */ | |
424 | case sun4m: | |
425 | case sun4d: | |
426 | return (srmmu_get_pte (addr) >> 28); | |
427 | default: | |
428 | return -1; | |
429 | } | |
430 | } | |
431 | ||
432 | extern unsigned long *sparc_valid_addr_bitmap; | |
433 | ||
434 | /* Needs to be defined here and not in linux/mm.h, as it is arch dependent */ | |
435 | #define kern_addr_valid(addr) \ | |
436 | (test_bit(__pa((unsigned long)(addr))>>20, sparc_valid_addr_bitmap)) | |
437 | ||
438 | extern int io_remap_page_range(struct vm_area_struct *vma, | |
439 | unsigned long from, unsigned long to, | |
440 | unsigned long size, pgprot_t prot, int space); | |
441 | extern int io_remap_pfn_range(struct vm_area_struct *vma, | |
442 | unsigned long from, unsigned long pfn, | |
443 | unsigned long size, pgprot_t prot); | |
444 | ||
445 | /* | |
446 | * For sparc32&64, the pfn in io_remap_pfn_range() carries <iospace> in | |
447 | * its high 4 bits. These macros/functions put it there or get it from there. | |
448 | */ | |
449 | #define MK_IOSPACE_PFN(space, pfn) (pfn | (space << (BITS_PER_LONG - 4))) | |
450 | #define GET_IOSPACE(pfn) (pfn >> (BITS_PER_LONG - 4)) | |
451 | #define GET_PFN(pfn) (pfn & 0x0fffffffUL) | |
452 | ||
453 | #include <asm-generic/pgtable.h> | |
454 | ||
455 | #endif /* !(__ASSEMBLY__) */ | |
456 | ||
457 | /* We provide our own get_unmapped_area to cope with VA holes for userland */ | |
458 | #define HAVE_ARCH_UNMAPPED_AREA | |
459 | ||
460 | /* | |
461 | * No page table caches to initialise | |
462 | */ | |
463 | #define pgtable_cache_init() do { } while (0) | |
464 | ||
465 | #endif /* !(_SPARC_PGTABLE_H) */ |